The pieces are neckwear: pendants need chains while necklaces are pieces that are all-in-one. There are five choices for chain length: 16", 18", 20", 24",m or no chain. The most popular length of chain is 18". The chains we provide are sterling silver for the silver pendants and gold filled chains for the 14K yellow gold pendants. Please contact us if you are interested in purchasing 14K yellow gold chains.